Figure 3: Illustration of the ciliary beat of T. cruzi. The forward parasite motility resulting from tip-to-base flagellar wave propagation (panels a–d) was interrupted by a sudden pause in which almost no movement of the parasite was observed (Ø). A base-to-tip wave propagation was observed before the parasite reinitiated the tip-to-base flagellar beat that resulted in a very little translational motion and clearly reoriented the parasite re-orientation and restarted the forward motion of the cell (panels f–i). These images correspond to those from an epimastigote obtained from the light blue region of Figure 1.